Restraint of Trade. Robinson-Patman Act. Price Discrimination between Two Purely Intrastate Sales by a Corporation Engaged in Interstate Commerce Satisfies the Jurisdictional Requirements of Section 1(a) of the Act. Little John v. Shell Oil Co., 456 F. 2d 225 (5th Cir. 1972), Petition for Rehearing En Banc Granted, No. 71-2090 (Jan. 2, 1973)